CN111460750A - Automatic generating system and method for protection setting values of generator and transformer - Google Patents
Automatic generating system and method for protection setting values of generator and transformer Download PDFInfo
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- CN111460750A CN111460750A CN201911349147.0A CN201911349147A CN111460750A CN 111460750 A CN111460750 A CN 111460750A CN 201911349147 A CN201911349147 A CN 201911349147A CN 111460750 A CN111460750 A CN 111460750A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
Abstract
The invention provides a system and a method for automatically generating protection setting values of a generator and a transformer, which can check the short-circuit capacity and the dynamic and thermal stability of primary equipment according to the maximum short-circuit current calculation, the impulse current calculation, the attenuation characteristic of fault current and the stable period component calculation of each node of the system in a large mode, can automatically calculate the protection setting values of a large-scale hydraulic generator and the transformer, can output a protection setting value list according to a fixed value single format of a device, can check the dynamic stability and the thermal stability of the equipment and output a check result, and solves the problems of the power plant on the fixed value calculation and the short-circuit capacity check of the generator and the transformer protection device The method comprises the steps of power system transformer protection setting calculation, power system fault analysis, load flow calculation and the like, and is widely applied and developed.
Description
Technical Field
The invention belongs to the technical field of power system relay protection, and mainly relates to a method and a device for automatically generating protection setting values of a generator and a transformer.
Background
According to the requirement of 'unified fixed value and report format' in the 'six unification' principle of the relay protection design specification, the automatic calculation and the generation of the fixed value list by a computer are possible.
Checking the relay protection setting value periodically according to the monitoring work requirement of the relay protection technology, and simultaneously checking the dynamic stability and the thermal stability of the equipment periodically according to the system change. Due to the limitation of professional technologies, a general power plant usually requires a professional organization to carry out the work and invests a large amount of capital, for example, a file of Yunan industry Command electric power (2017) 266 requires a power generator and a transformer protection constant value setting calculation work to be carried out by a related test research institute, and the charge is dozens of ten thousand yuan per station.
Disclosure of Invention
In order to solve the defects of the prior art, the inventor provides a system and a method for automatically generating protection setting values of a generator and a transformer through research and development design, can automatically calculate the protection setting values of the large-scale hydraulic generator and the transformer, outputs a protection setting value sheet according to a set setting value single format of a device, can check the dynamic stability and the thermal stability of equipment, outputs a check result, and solves the problems of the power plant in calculating the setting values of the generator and the transformer protection device and checking the short-circuit capacity of the equipment.
Specifically, the invention is realized by the following steps:
a generator and transformer protection setting value automatic generation system comprises:
the equipment parameter input and equivalent impedance generation module is used for inputting original parameter information of the power system equipment, performing input format compilation, converting a reference value, protecting a conventional value of a device, protecting a field debugging value and a test measured value; calculating the equivalent impedance and the per unit value of the system; simplifying and calculating a system fault network diagram and calculating equivalent network diagrams of all sequences according to the fault type of the power system; obtaining general convention and test value information of the power system equipment;
the short circuit calculation and setting value calculation module is used for calculating and checking the short circuit capacity of the power system equipment and setting protection, and calculating the maximum short circuit current of each node of the power system equipment in a large square mode, calculating the impulse current, calculating the attenuation characteristic of fault current and the stable period component and setting the relay protection of the universal large generator and the transformer according to the protection principle; and the device is used for checking whether the dynamic stability and the thermal stability of the primary equipment, the short-circuit capacity of a switch and the overload capacity of the equipment meet the requirements or not according to the calculation result to obtain the calculated values of the short-circuit capacity and the setting value;
the setting value reasonability examination module is used for examining the reasonability of the setting value one by one according to the short circuit calculation result, the actual measurement parameters of the field debugging test of the power system equipment, the technical requirements of equipment manufacturers and the field operation requirements of the system, and finally determining the setting value;
and the fixed value list generating and outputting module is used for compiling the short circuit calculation results and the set values after examination and setting according to a preset fixed value list format, protecting the set value notice of the generator and the transformer which conform to the actual field, and automatically linking the set parameters to the examined and set fixed value addresses one by one to generate the set value notice.
Further, the constant value list generating and outputting module further includes:
and generating a setting value of a protection device and compiling a typical setting value list of the protection device according to design specification requirements of unified function configuration, unified loop design, unified terminal row arrangement, unified interface standard, unified screen cabinet pressing plate, unified protection setting value and unified report format.
Furthermore, the short circuit calculation and setting value calculation module also checks the short circuit capacity and dynamic and thermal stability of the primary power system equipment according to the maximum short circuit current calculation, impulse current calculation, fault current attenuation characteristic and stable period component calculation of each node of the system in a large mode.
Further, the equivalent impedance and per unit value calculation of the power system equipment comprises the calculation of parameters of each element of a main wiring diagram and an equivalent impedance diagram of a power station generator, a transformer and a system, so that a simplified equivalent impedance diagram of the power system equipment and the like is obtained.
Further, the electric power system fault type and fault network diagram are simplified and calculated, and the calculation comprises calculation of positive sequence, negative sequence and zero sequence equivalent network diagrams of three-phase short circuit, two-phase short circuit and single-phase earth fault of each node in a large mode and a small mode; and fault current calculation and fault voltage calculation of three-phase short circuit, two-phase short circuit and single-phase grounding of each node in a large mode and a small mode of the power system.
Furthermore, the power system equipment generally appoints and tests test value information, including conventional system parameter settings of the generator and the transformer protection device, field protection debugging test parameters, actual test values of field primary equipment parameters, equipment manufacturer technology and field operation required values.
In another aspect of the present invention, a method for automatically generating a protection setting value of a generator and a transformer is provided, which includes the following steps:
s1, inputting original parameters of power system equipment and power plant equipment, conventional values of a protection device, protection field debugging and test measured values, and performing input format compilation and conversion of reference values to obtain a setting calculation original parameter table;
s2, calculating the equivalent impedance or the per unit value of the system; simplifying and calculating a system fault network diagram and calculating equivalent network diagrams of all sequences according to the fault type of the power system; obtaining the fault quantity required by the fault calculation and fault analysis of the power system;
s3, acquiring parameters in the steps S1 and S2, and performing protection fixed value setting calculation on each protection function based on a corresponding parameter calculation method and a correspondingly set intermediate variable according to the protection function principle of the generator and the transformer to obtain a determined setting value;
and S4, based on the setting value in S3, combining the actual operation requirement of the power system equipment, compiling and outputting a corresponding fixed value notice.
Further, the power system equipment parameters, the power plant equipment parameters, the protection device normal values, the protection field debugging and the test measured values include: the system equivalent parameter, the basic parameter of an engine, the basic parameter of a main transformer, the basic parameter of a reactor, the excitation variable parameter, the high-rise plant variable parameter, the public variable parameter, the lighting variable parameter, the dam crest variable parameter, the overhaul variable parameter, the equipment library variable parameter, the camp variable parameter and the plant diesel generation variable parameter.
Further, the simplifying and calculating of the power system fault type to the system fault network diagram and the calculating of the equivalent network diagrams in each sequence comprise: generating one or more of a system equivalent diagram, main transformer impedance calculation, per-unit value calculation under the condition that each element is converted into reference adjustment, generating a system equivalent impedance diagram and calculating fault current of each generator when various faults occur.
The protection constant value and the report format are unified, so that the protection constant value and the report format are unified according to the standard format by each protection device manufacturer, and conditions are created for standardization of field operation and maintenance.
The invention adopts a further technical scheme for solving other technical problems that: and checking the short-circuit capacity, dynamic stability and thermal stability of the primary equipment according to the maximum short-circuit current calculation, the impulse current calculation, the fault current attenuation characteristic and the stable period component calculation of each node of the system in a large mode.
The invention has the beneficial effects that: the method comprises the steps that a computer developed based on Excel table programming automatically calculates protection setting values of a large-scale hydraulic generator and a transformer, a protection setting value sheet is output according to a set setting value sheet format of a device, meanwhile, the dynamic stability and the thermal stability of equipment can be checked, a check result is output, the problems of generator and transformer protection device setting value calculation and equipment short-circuit capacity check of a power plant are solved, a professional organization is required to be entrusted to carry out the work due to professional technology limitation of a general power plant, and therefore large funds are saved, the system carries out setting work on the setting values of a # 1-5 generator and a transformer protection device which are put into operation in a Longkou corporation aiming at WFB-800 type produced by a relay company, checks the short-circuit capacity of primary system equipment of the Longkou hydropower station, and saves technical consultation cost by over 120 ten thousand yuan in 2019 years of the Longkou hydropower station. The method has extremely high popularization value in the hydropower station. Without any other software being installed or added. The technology is suitable for power technicians with general professional knowledge to use, and special professional technical requirements are not needed. The technology has strong generalization and wide application and development application, and can be popularized and used for generators of thermal power plants, transformer protection setting calculation of power systems, fault analysis of power systems, load flow calculation and the like.
Drawings
FIG. 1 is a schematic diagram of a generator and transformer protection setting value automatic generation system;
FIG. 2 is a schematic diagram illustrating steps of a method for automatically generating protection setting values of a generator and a transformer;
FIG. 3 is a table illustrating system parameters and power plant equipment parameters;
FIG. 4 is a main wiring diagram under the original parameters;
FIG. 5 is a diagram of the equivalent impedance of the system under the selected reference value in example 2;
FIG. 6 is a simplified impedance diagram of K1 point three-phase short-circuit period component calculation in the large equation of example 2;
FIG. 7 is a simplified impedance diagram of K1 point three-phase short-circuit sub-transient component calculation in the large formula of example 2;
FIG. 8 is a simplified graph of calculated impedance of the K1 point three-phase short transient component in example 2;
fig. 9 is a graph of the decay of the three-phase fault current at point K1 with time in example 2;
FIG. 10 is the operating impedance of the loss of field protection of embodiment 2;
FIG. 11 is a magnetic loss drop-shaped impedance circle of the water turbine generator in example 2;
FIG. 12 is a WFB-801A/F generator protection device constant value single top page view;
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The terms mentioned in the present embodiment explain:
the original parameter information of the power system equipment refers to: line impedance, synchronous reactance of the generator, transient state reactance, sub-transient state reactance, short-circuit impedance of the transformer and other equipment parameters.
Protecting field debugging and test measured values, namely: the protection commissioning test needs system parameter tests performed in the operation of the unit, such as the neutral point voltage of a generator and a transformer, differential protection unbalanced current and the like.
Power system fault types, including which: three-phase short-circuit fault, two-phase short-circuit fault, single-phase earth fault, line disconnection fault and the like.
Simplification and calculation, and calculation of equivalent network diagrams of each sequence, wherein the simplification refers to: "Each order" means: the simplification is that the impedance diagram of the complex system is gradually simplified into an equivalent impedance circuit diagram in the process of calculating the fault of the power system, and each sequence refers to positive sequence impedance, negative sequence impedance and zero sequence impedance (terminology)
General contract and tentative test value information, including which: the conventional convention refers to parameters such as 100V of device voltage, 1A or 5A of point current and the like, and experimental test values such as neutral point voltage, differential protection unbalanced current and the like.
The original parameters of the power system equipment and the power plant equipment refer to: same power system equipment original parameter information
The fault amount required by the fault calculation and fault analysis of the power system is as follows: short-circuit current (maximum short-circuit current, zero-sequence current, negative-sequence current, etc.), zero-sequence voltage, etc.;
acquiring parameters in the steps S1 and S2, and performing protection fixed value setting calculation on each protection function based on a corresponding parameter calculation method and a corresponding set intermediate variable according to the protection function principle of the generator and the transformer to obtain a determined setting value; wherein: the protection function principle of the generator and the transformer specifically refers to a relay protection function configured according to different fault types, and different manufacturers can realize the protection function by using different principles, such as generator stator ground protection, stator ground protection with signal injection type and stator ground protection consisting of fundamental wave zero sequence voltage and third harmonic; the protection functions corresponding to different principles are specific setting parameters and calculation methods, and the intermediate variables refer to parameter storage addresses in the calculation process of the system.
Example 1: all calculation functions of the power system fault analysis calculation, the protection setting calculation and the like are subjected to related calculation and comparison through programming and automatically to obtain results, and a fixed value list is output through a pre-programmed fixed value list format.
The automatic setting value calculation system comprises an equipment parameter input and equivalent impedance generation module; general agreement and test value module; a short circuit calculation and setting value calculation module; a setting value rationality examination module; and generating a constant value list and printing and outputting the constant value list.
The equipment parameter input and equivalent impedance generation module comprises the steps of original equipment parameter input format compilation, system equivalent impedance (per unit value) calculation, system fault network diagram simplification and calculation according to the fault type of the power system and equivalent network diagram calculation in each sequence.
The general convention and test value module comprises a generator, conventional system parameter setting of a transformer protection device, field protection debugging test parameters, actual test values of field primary equipment parameters and technical requirement values of an equipment manufacturer.
The short circuit calculation and setting value calculation module comprises calculation and check of short circuit capacity of power equipment and protection setting calculation, and comprises maximum short circuit current calculation, impulse current calculation, calculation of attenuation characteristics and stable period components of fault current of each node of the system in a large mode, and setting calculation of relay protection of transformers of large generators according to D L/T684-2012 technical specifications of setting protection of large generators and generator-transformer sets in south, calculation procedures of relay protection setting of transformers of large generators in south, calculation guidance of relay protection setting of power plant use D L T1502-2016 and technical specifications of device manufacturers and field operation requirements.
The setting value reasonability examination module is used for examining and setting the automatic calculation recommendation results one by one according to actual field test values of a field debugging test actual measurement parameter of the protection device, a field one-time equipment parameter commissioning short-circuit test, a boosting test, a temperature rise test, a grid connection test and the like and technical requirements of equipment manufacturers and fully considering the requirements of reliability, rapidity, sensitivity, selectivity and field operation of the relay protection device.
The constant value list generating and outputting module comprises a constant value list format of a generator and a transformer protection device designed according to the 'six unification' design specification requirement, compiles a generator and transformer protection setting value notice which accords with the field reality, automatically links all setting parameters to checked and set constant value addresses one by one, and finally generates the setting value notice.
Example 2: a large-scale hydraulic generator developed based on Excel, a transformer protection setting value calculation system, as shown in figure 1, comprises an equipment parameter input and equivalent impedance generation module; general agreement and test value module; a short circuit calculation and setting value calculation module; a setting value rationality examination module; and generating and outputting a constant value list.
The specific implementation method is described by taking the fixed value setting process of the generator and the transformer protection device of Longkou corporation # 1-5 as an example.
(1) The device parameter input and equivalent impedance generation module comprises:
step S1, according to the system parameters and the power plant equipment parameters, a system parameter table is compiled, and complete parameters are input, the parameter table is shown in figure 3,
step S2, selecting a proper per unit value according to the system parameters, and converting all the parameters into per unit values under the selected reference value, as shown in FIG. 4, to obtain an equivalent system impedance diagram;
wherein the setting for short circuit calculation
The calculation method comprises the following steps: compiling a calculation formula, wherein data in the formula are all linked from an equipment parameter table:
and (3) calculating the main transformer impedance:
where C54 is referenced from the device parameter! C36, E54 reference from device parameters! C41 and B34 are reference capacities.
Converting each element to a per-unit value under a reference condition:
the equivalent impedance plot of the system is shown in figure 5,
step S3, calculating the fault current and voltage of each device (fault point) (taking K1 point three-phase short-circuit fault as an example). The calculation of the data in the figure requires basic electrical knowledge, the equivalent impedance diagram after simplification,
when a three-phase short-circuit fault occurs at the point K1, the periodic component of the fault current is calculated, an equivalent diagram in a large equation is shown in fig. 6, and the calculation result of the equivalent impedance is shown in the following table:
the fault current period component of each unit:
IkG＝12.2870kA
the non-periodic component of the fault current of each generator (sub-transient component) is calculated when the high-voltage side of the main transformer is in three-phase short circuit at K1 point, Xd' is used to replace Xd, an equivalent diagram in a big formula is shown in FIG. 7, and equivalent impedance is calculated:
the non-periodic component (sub-transient component) of the fault current of each unit is as follows:
IKGaper＝34.9407
the non-periodic component of the fault current of each generator (transient component) when the high-voltage side of the main transformer is in three-phase short circuit at the K1 point is calculated, Xd' is used for replacing Xd, an equivalent diagram in a large formula is shown in FIG. 8, and equivalent impedance is calculated:
the non-periodic component (transient component) of the fault current of each unit is as follows:
TKGapeR＝28.9490KA
D. generator 1G supplies short circuit full current formula:
the formula consists of an exponential function, a trigonometric function, etc., and is known as (T)a＝0.44；T′a＝2.12； T″a0.12), the short-circuit current reaches a maximum value (peak value) when t is 0.01s according to the maximum value principle: the calculation process can be divided into a plurality of functions, i ═ f (t) is finally taken, and a decay graph of fault current and time (the graph is current at the initial stage of the fault, at the 1s of the fault and at the 2s of the fault) can be calculated and drawn, so that whether the short-circuit capacity of the switch equipment meets the requirement can be checked, and meanwhile, the blocking trip current of the switch can be set.
A decay plot of fault current versus time is obtained as shown in fig. 9.
And step S4, performing protection constant value setting calculation according to the protection function principle of the generator and the transformer (the setting calculation of the generator field loss protection setting impedance circle is taken as an example).
According to the requirements of D L/T684-2012 'Relay protection setting calculation guide rule for transformers of large generators', 'southern Power grid large generators and Generator Transformer protection setting technical Specification', 'southern Power grid Large generators Relay protection setting calculation procedure', a parameter calculation formula is compiled, and related parameter addresses are quoted in the parameter table and fault calculation (setting calculation) process, so that the fixed value result is automatically calculated (for some calculation results, the optimal parameters can be determined according to field tests, then the setting values are determined)
Calculation process! J155 equipment parameters |! C6 device parameters |! C6/device parameters! C4 device parameters |! C28/device parameters! C32
Note that: all the calculation data in the formula are led from the equipment parameter input and the numerical address in the equivalent impedance generation module. And similarly, setting other fixed values.
Stator impedance criterion: and setting the asynchronous boundary impedance relay. The asynchronous boundary impedance circle action criterion is mainly used for generator magnetic loss fault detection closely connected with a system, and can reflect the final impedance at the end of a magnetic loss generator, but the action is possibly late.
The asynchronous circle formula is as follows:
the circle of restitution formula is as follows:
15.46 (|, its calculation process | J155 |, equipment parameters | C6 |, equipment parameters | C6/equipment parameters | C4 |, equipment parameters | C28/equipment parameters | C32)
Xcon is equal to the system minimum reactance X of the main transformer high-voltage side bus of the power plantS.min(informed by the dispatch center, corresponding to the maximum mode of operation).
Reactive reverse definite value (reactive setting according to advance phase operation allowed under the rated active power of the generator in cooperation with the static limit impedance)
Q＝Krel·Qjx＝1.3*Qjx＝44.7
As a fault and oscillation malfunction prevention, generally, the following settings are set:
Q＝5％·Qgn＝0.05*Qgn＝2.42
the asynchronous circle and the static circle are shown in fig. 10, wherein the circle 1 is an asynchronous circle (the system is closely connected), the circle 2 is a static limit circle of the turbonator, and the straight line 3 is a reactive reverse direction;
the loss magnetic droplet impedance circle of the hydraulic generator is shown in fig. 11.
And compiling a fixed value single format of the protection device.
And compiling a fixed value single format according to the 'six unification' standard requirement of relay protection design and the actual device. (the following is a schematic diagram of the Tokyo company system parameters and plant equipment parameter table), as shown in FIG. 12;
and establishing parameter links of each element according to the constant value format. If the constant value of the 3.4 ratio brake coefficient is linked with a constant value of a self ═ D: \ relay protection setting calculation system 1\ short circuit current calculation 2019.xls of the dragon-cut power plant ] zero sequence differential protection setting'! And $ N $7 ". And after finishing establishing all constant value parameter links, automatically opening a setting calculation result link and outputting a constant value list.
And (4) auditing the fixed value list, and auditing the reasonability of each fixed value, wherein the auditing is mainly carried out on the matching of backup protection and other protections and the conformity to the operation requirement, and a certain professional basis is required.
And after the fixed value list is audited, carrying out electronic signature, and printing the fixed value list.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a generator, transformer protection setting value automatic generation system which characterized in that includes:
the equipment parameter input and equivalent impedance generation module is used for inputting original parameter information of the power system equipment, performing input format compilation, converting a reference value, protecting a conventional value of a device, protecting a field debugging value and a test measured value; calculating the equivalent impedance and the per unit value of the system; simplifying and calculating a system fault network diagram and calculating equivalent network diagrams of all sequences according to the fault type of the power system; obtaining general convention and test value information of the power system equipment;
the short circuit calculation and setting value calculation module is used for calculating and checking the short circuit capacity of the power system equipment and setting protection, and calculating the maximum short circuit current of each node of the power system equipment in a large square mode, calculating the impulse current, calculating the attenuation characteristic of fault current and the stable period component and setting the relay protection of the universal large generator and the transformer according to the protection principle; and the device is used for checking whether the dynamic stability and the thermal stability of the primary equipment, the short-circuit capacity of a switch and the overload capacity of the equipment meet the requirements or not according to the calculation result to obtain the calculated values of the short-circuit capacity and the setting value;
the setting value reasonability examination module is used for examining the reasonability of the setting value one by one according to the short circuit calculation result, the actual measurement parameters of the field debugging test of the power system equipment, the technical requirements of equipment manufacturers and the field operation requirements of the system, and finally determining the setting value;
and the fixed value list generating and outputting module is used for compiling the short circuit calculation results and the set values after examination and setting according to a preset fixed value list format, protecting the set value notice of the generator and the transformer which conform to the actual field, and automatically linking the set parameters to the examined and set fixed value addresses one by one to generate the set value notice.
2. The method for automatically generating the protection setting value of the generator and the transformer according to claim 1, wherein the setting value list generating and outputting module further comprises:
and generating a setting value of a protection device and compiling a typical setting value list of the protection device according to design specification requirements of unified function configuration, unified loop design, unified terminal row arrangement, unified interface standard, unified screen cabinet pressing plate, unified protection setting value and unified report format.
3. The method for automatically generating the protection setting value of the generator and the transformer according to claim 1, wherein the short-circuit calculation and setting value calculation module is further used for checking the short-circuit capacity, the dynamic stability and the thermal stability of the primary power system equipment according to the maximum short-circuit current calculation, the impulse current calculation, the fault current attenuation characteristic and the stable period component calculation of each node of the system in a large mode.
4. The method for automatically generating the protection setting values of the generator and the transformer according to claim 1, wherein the calculation of the equivalent impedance and the per unit value of the power system equipment comprises the calculation of parameters of elements of a main wiring diagram and an equivalent impedance diagram of the generator and the transformer connected with the system of the power station, so that a simplified equivalent impedance diagram of the power system equipment is obtained.
5. The method according to claim 1, wherein the power system fault type and fault network diagram simplification and calculation includes calculation of equivalent network diagrams of three-phase short circuit, two-phase short circuit and single-phase earth fault positive sequence, negative sequence and zero sequence of each node in large mode and small mode; and fault current calculation and fault voltage calculation of three-phase short circuit, two-phase short circuit and single-phase grounding of each node in a large mode and a small mode of the power system.
6. The method for automatically generating the protection setting values of the generator and the transformer as claimed in claim 1, wherein the general convention and test value information of the power system equipment comprises conventional system parameter settings of the generator and the transformer protection device, field protection debugging test parameters, actual test values of field primary equipment parameters, and technical and field operation requirement values of an equipment manufacturer.
7. A method for automatically generating protection setting values of a generator and a transformer is characterized by comprising the following steps:
s1, inputting original parameters of power system equipment and power plant equipment, conventional values of a protection device, protection field debugging and test measured values, and performing input format compilation and conversion of reference values to obtain a setting calculation original parameter table;
s2, calculating the equivalent impedance or the per unit value of the system; simplifying and calculating a system fault network diagram and calculating equivalent network diagrams of all sequences according to the fault type of the power system; obtaining the fault quantity required by the fault calculation and fault analysis of the power system;
s3, acquiring parameters in the steps S1 and S2, and performing protection fixed value setting calculation on each protection function based on a corresponding parameter calculation method and a correspondingly set intermediate variable according to the protection function principle of the generator and the transformer to obtain a determined setting value;
and S4, based on the setting value in S3, combining the actual operation requirement of the power system equipment, compiling and outputting a corresponding fixed value notice.
8. The method for automatically generating the protection setting values of the generator and the transformer according to claim 7, wherein the power system equipment parameters, the power plant equipment parameters, the protection device normal values, the protection field debugging and the test actual values comprise: the system equivalent parameter, the basic parameter of an engine, the basic parameter of a main transformer, the basic parameter of a reactor, the excitation variable parameter, the high-rise plant variable parameter, the public variable parameter, the lighting variable parameter, the dam crest variable parameter, the overhaul variable parameter, the equipment library variable parameter, the camp variable parameter and the plant diesel generation variable parameter.
9. The method for automatically generating the protection setting values of the power generator and the transformer according to claim 7, wherein the simplification and calculation of the network diagram of the power system fault type to the system fault and the calculation of the equivalent network diagram of each sequence comprise: generating one or more of a system equivalent diagram, main transformer impedance calculation, per-unit value calculation under the condition that each element is converted into reference adjustment, generating a system equivalent impedance diagram and calculating fault current of each generator when various faults occur.
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| CN111999562A (en) * | 2020-08-17 | 2020-11-27 | 西安热工研究院有限公司 | Method for measuring system impedance by using generator phase-in operation |
| CN111999562B (en) * | 2020-08-17 | 2023-02-24 | 西安热工研究院有限公司 | Method for measuring system impedance by using generator phase-in operation |
| CN112464416A (en) * | 2020-11-13 | 2021-03-09 | 国网山东省电力公司青岛供电公司 | One-key type substation total station fixed value generation method and system |
| CN112464416B (en) * | 2020-11-13 | 2023-05-30 | 国网山东省电力公司青岛供电公司 | Method and system for generating all-station fixed value of one-key transformer substation |
| CN114204514A (en) * | 2021-11-23 | 2022-03-18 | 中国南方电网有限责任公司 | Processing method for special operation mode of power grid for relay protection |
| CN114204514B (en) * | 2021-11-23 | 2024-04-26 | 中国南方电网有限责任公司 | Processing method of special operation mode of power grid for relay protection |
| CN116706840A (en) * | 2023-08-01 | 2023-09-05 | 云南电网有限责任公司 | Power plant network-related loss of magnetic protection fixed value checking and optimizing method and system |
| CN116706840B (en) * | 2023-08-01 | 2023-10-13 | 云南电网有限责任公司 | Power plant network-related loss of magnetic protection fixed value checking and optimizing method and system |
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